Thank you for the kind information. That is exactly what I was seeking.
I am afraid I disagree about the original advice given. I had the destinct feeling of 'being talked down too'. For which, I am, too old and too tired.
But! Life is too short. I for my part apologise if any offence has been taken by anybody over this exchange of messages.
I can be a little testy at the moment. I think it has to do with giving up smoking?
What have I done?